Linda wrote:
So, do you know where locally I can get some?

Not sure about locally in SAT, but here in Austin several nurseries
have excellent agave selections.
http://austin.citysearch.com/profile...s_nursery.html
http://austin.citysearch.com/profile..._gardener.html
http://austin.citysearch.com/profile...n_nursery.html
http://austin.citysearch.com/profile...x/gardens.html

An excellent source for information is Yucca-do, which sells them
online:
http://www.yuccado.com/

Good luck!

Victor